SAINT HELENA, CALIFORNIA

Monthly Extreme Minimum Temperature (Degrees Fahrenheit)

(047643)

File last updated on Jul 24, 2006
*** Note *** Provisional Data *** After Year/Month 200603
a = 1 day missing, b = 2 days missing, c = 3 days, ..etc..,
z = 26 or more days missing, A = Accumulations present
Long-term means based on columns; thus, the monthly row may not
sum (or average) to the long-term annual value.
MAXIMUM ALLOWABLE NUMBER OF MISSING DAYS : 5
Individual Months not used for annual or monthly statistics if more than 5 days are missing.
Individual Years not used for annual statistics if any month in that year has more than 5 days missing.
YEAR(S) JAN FEB MAR APR MAY JUN JUL AUG SEP OCT NOV DEC ANN
1931 ----- z 33.00 i 30.00 33.00 42.00 46.00 44.00 41.00 35.00 33.00 23.00 25.00 23.00
1932 25.00 25.00 29.00 c 29.00 38.00 44.00 42.00 g 42.00 39.00 31.00 27.00 a 11.00 c 11.00
1933 24.00 27.00 31.00 29.00 31.00 a 38.00 45.00 45.00 37.00 35.00 24.00 27.00 24.00
1934 30.00 31.00 38.00 34.00 40.00 40.00 42.00 45.00 35.00 31.00 34.00 29.00 29.00
1935 24.00 28.00 27.00 31.00 38.00 42.00 41.00 42.00 39.00 26.00 25.00 25.00 24.00
1936 30.00 25.00 28.00 28.00 a 39.00 44.00 44.00 43.00 37.00 32.00 23.00 21.00 21.00
1937 16.00 29.00 32.00 33.00 39.00 42.00 47.00 40.00 40.00 39.00 32.00 28.00 16.00
1938 29.00 29.00 29.00 33.00 38.00 42.00 42.00 40.00 40.00 32.00 24.00 28.00 24.00
1939 26.00 25.00 28.00 32.00 33.00 38.00 43.00 42.00 38.00 29.00 30.00 29.00 25.00
1940 25.00 30.00 30.00 35.00 37.00 47.00 44.00 43.00 40.00 35.00 28.00 24.00 24.00
1941 28.00 30.00 33.00 33.00 36.00 38.00 48.00 46.00 38.00 32.00 25.00 26.00 25.00
1942 23.00 27.00 30.00 33.00 35.00 42.00 45.00 38.00 39.00 37.00 29.00 28.00 23.00
1943 21.00 25.00 30.00 35.00 36.00 40.00 45.00 42.00 41.00 33.00 32.00 25.00 21.00
1944 28.00 27.00 28.00 31.00 35.00 39.00 43.00 41.00 37.00 37.00 30.00 30.00 27.00
1945 22.00 27.00 26.00 30.00 37.00 a 40.00 43.00 43.00 37.00 35.00 30.00 23.00 22.00
1946 24.00 23.00 b 31.00 32.00 38.00 40.00 44.00 43.00 39.00 23.00 27.00 25.00 23.00
1947 22.00 30.00 31.00 37.00 37.00 42.00 44.00 42.00 39.00 39.00 26.00 26.00 22.00
1948 21.00 22.00 27.00 31.00 36.00 44.00 40.00 43.00 38.00 31.00 25.00 19.00 19.00
1949 19.00 22.00 31.00 34.00 41.00 41.00 42.00 42.00 40.00 27.00 36.00 25.00 19.00
1950 20.00 22.00 28.00 34.00 32.00 37.00 44.00 42.00 37.00 32.00 36.00 31.00 20.00
1951 25.00 26.00 24.00 30.00 39.00 40.00 43.00 45.00 41.00 39.00 29.00 25.00 24.00
1952 23.00 27.00 28.00 32.00 33.00 36.00 50.00 42.00 39.00 37.00 27.00 30.00 c 23.00
1953 29.00 28.00 28.00 27.00 a 35.00 40.00 43.00 45.00 39.00 35.00 32.00 27.00 j 27.00
1954 25.00 30.00 28.00 35.00 38.00 c 41.00 b 45.00 i 44.00 40.00 34.00 27.00 26.00 25.00
1955 25.00 25.00 b 27.00 30.00 38.00 38.00 39.00 g 43.00 c 38.00 34.00 29.00 29.00 25.00
1956 26.00 25.00 29.00 31.00 a 39.00 42.00 b 48.00 g 45.00 41.00 30.00 29.00 22.00 22.00
1957 22.00 b 23.00 31.00 34.00 a 43.00 b 48.00 b 47.00 40.00 42.00 40.00 a 29.00 29.00 22.00
1958 27.00 32.00 29.00 34.00 39.00 45.00 49.00 48.00 a 43.00 39.00 25.00 32.00 25.00
1959 27.00 27.00 o 35.00 c 35.00 37.00 k 42.00 a 47.00 44.00 b 42.00 40.00 f 30.00 25.00 25.00
1960 21.00 28.00 d 30.00 31.00 35.00 47.00 44.00 46.00 d 40.00 b 38.00 e 30.00 28.00 21.00
1961 21.00 e 31.00 34.00 g 31.00 36.00 43.00 i 46.00 c 46.00 40.00 33.00 d 23.00 26.00 21.00
1962 24.00 30.00 28.00 35.00 37.00 40.00 46.00 42.00 42.00 38.00 31.00 22.00 22.00
1963 21.00 35.00 28.00 31.00 35.00 45.00 42.00 44.00 46.00 37.00 32.00 26.00 21.00
1964 26.00 27.00 29.00 30.00 33.00 42.00 44.00 45.00 40.00 38.00 26.00 25.00 25.00
1965 25.00 30.00 31.00 30.00 36.00 44.00 43.00 47.00 37.00 38.00 29.00 22.00 22.00
1966 24.00 27.00 24.00 35.00 39.00 41.00 45.00 46.00 42.00 33.00 30.00 26.00 24.00
1967 28.00 29.00 28.00 30.00 34.00 46.00 46.00 47.00 46.00 42.00 30.00 25.00 25.00
1968 22.00 31.00 32.00 35.00 35.00 44.00 46.00 45.00 42.00 35.00 32.00 21.00 21.00
1969 24.00 28.00 27.00 32.00 41.00 46.00 46.00 43.00 44.00 37.00 27.00 27.00 24.00
1970 24.00 31.00 31.00 31.00 37.00 44.00 46.00 43.00 38.00 32.00 35.00 25.00 24.00
1971 25.00 27.00 24.00 31.00 39.00 40.00 45.00 45.00 39.00 32.00 28.00 26.00 24.00
1972 25.00 26.00 29.00 31.00 40.00 39.00 44.00 45.00 40.00 34.00 30.00 17.00 17.00
1973 21.00 31.00 29.00 34.00 39.00 44.00 45.00 41.00 43.00 37.00 29.00 31.00 21.00
1974 24.00 30.00 30.00 34.00 33.00 43.00 44.00 46.00 40.00 40.00 30.00 25.00 24.00
1975 21.00 31.00 33.00 30.00 35.00 42.00 42.00 45.00 41.00 34.00 26.00 26.00 21.00
1976 21.00 27.00 27.00 29.00 37.00 37.00 46.00 46.00 43.00 34.00 27.00 24.00 21.00
1977 25.00 29.00 27.00 34.00 34.00 45.00 44.00 45.00 45.00 40.00 26.00 29.00 25.00
1978 31.00 31.00 36.00 34.00 40.00 45.00 40.00 32.00 43.00 37.00 24.00 22.00 22.00
1979 26.00 29.00 a 33.00 32.00 30.00 ----- z ----- z ----- z ----- z ----- z ----- z ----- z 26.00
1980 ----- z ----- z ----- z ----- z ----- z ----- z ----- z ----- z ----- z ----- z 30.00 21.00 c 21.00
1981 ----- z 33.00 35.00 a 36.00 41.00 ----- z 46.00 50.00 44.00 38.00 33.00 32.00 b 32.00
1982 27.00 27.00 31.00 32.00 40.00 42.00 47.00 ----- z 41.00 37.00 31.00 23.00 23.00
1983 24.00 32.00 35.00 34.00 38.00 47.00 46.00 48.00 47.00 41.00 33.00 32.00 24.00
1984 22.00 b 33.00 35.00 35.00 41.00 46.00 50.00 48.00 ----- z 35.00 ----- z ----- z 22.00
1985 28.00 28.00 32.00 41.00 ----- z ----- z 49.00 44.00 44.00 41.00 27.00 26.00 26.00
1986 ----- z 32.00 ----- z 36.00 ----- z 49.00 47.00 49.00 43.00 42.00 30.00 30.00 30.00
1987 ----- z 33.00 31.00 41.00 44.00 a ----- z ----- z ----- z 43.00 ----- z ----- z ----- z 31.00
1988 ----- z ----- z ----- z 39.00 35.00 39.00 ----- z 50.00 44.00 41.00 36.00 27.00 27.00
1989 29.00 24.00 31.00 37.00 42.00 43.00 47.00 50.00 45.00 36.00 34.00 27.00 24.00
1990 28.00 27.00 31.00 39.00 ----- z 44.00 49.00 50.00 44.00 42.00 31.00 14.00 14.00
1991 26.00 32.00 34.00 37.00 40.00 43.00 ----- z 46.00 47.00 36.00 32.00 24.00 24.00
1992 28.00 32.00 39.00 40.00 47.00 46.00 51.00 ----- z 45.00 46.00 30.00 23.00 23.00
1993 27.00 33.00 38.00 41.00 44.00 46.00 51.00 49.00 43.00 43.00 26.00 28.00 26.00
1994 32.00 31.00 32.00 41.00 43.00 45.00 48.00 48.00 46.00 40.00 30.00 28.00 28.00
1995 33.00 32.00 34.00 37.00 42.00 46.00 52.00 48.00 47.00 39.00 37.00 33.00 32.00
1996 33.00 30.00 35.00 36.00 39.00 45.00 50.00 48.00 47.00 38.00 37.00 30.00 30.00
1997 29.00 34.00 34.00 36.00 41.00 48.00 51.00 51.00 48.00 39.00 39.00 29.00 29.00
1998 31.00 36.00 30.00 32.00 ----- z 47.00 ----- z 50.00 49.00 38.00 35.00 24.00 24.00
1999 29.00 31.00 33.00 32.00 a 40.00 44.00 46.00 50.00 a 48.00 38.00 b 36.00 ----- z 29.00
2000 30.00 a 36.00 35.00 a 42.00 c 39.00 b 46.00 49.00 a 50.00 43.00 a 41.00 29.00 32.00 29.00
2001 26.00 31.00 34.00 33.00 a 45.00 a 47.00 a 51.00 49.00 49.00 a 44.00 35.00 35.00 26.00
2002 27.00 32.00 30.00 35.00 42.00 45.00 49.00 49.00 45.00 34.00 32.00 35.00 27.00
2003 37.00 29.00 36.00 35.00 39.00 47.00 48.00 51.00 45.00 41.00 a 33.00 29.00 29.00
2004 29.00 35.00 h 40.00 38.00 46.00 46.00 g 50.00 53.00 44.00 e 38.00 31.00 29.00 29.00
2005 ----- z 37.00 36.00 37.00 42.00 45.00 51.00 49.00 44.00 43.00 32.00 30.00 30.00
2006 32.00 29.00 32.00 37.00 42.00 ----- z ----- z ----- z ----- z ----- z ----- z ----- z 29.00
Period of Record Statistics
MEAN 25.68 29.04 30.90 33.79 38.27 42.97 45.86 45.14 41.75 36.30 29.82 26.24 23.71
S.D. 3.82 3.39 3.49 3.37 3.54 3.13 2.98 3.64 3.44 4.35 3.76 4.30 3.21
SKEW 0.28 -0.05 0.40 0.51 0.06 -0.25 0.22 -0.45 0.20 -0.46 0.20 -0.80 0.17
MAX 37.00 37.00 40.00 42.00 47.00 49.00 52.00 53.00 49.00 46.00 39.00 35.00 32.00
MIN 16.00 22.00 24.00 27.00 30.00 36.00 40.00 32.00 35.00 23.00 23.00 11.00 16.00
NO YRS 69 71 72 75 70 68 65 70 72 71 72 70 48